1-D Modeling of the Screw-Pinch Plasma in PROTO-SPHERA

A simple steady-state model for a 3-species mixture (ions, electrons, and neutrals) in a screw-pinch plasma configuration is developed. The model is applied to the central plasma column of the PROTO-SPHERA experiment. Degree of ionization, azimuthal current density, and azimuthal ion velocity are ca...

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Veröffentlicht in:	Fluids (Basel) 2019-03, Vol.4 (1), p.42
Hauptverfasser:	Buratti, Paolo, Tirozzi, Brunello, Alladio, Franco, Micozzi, Paolo
Format:	Artikel
Sprache:	eng
Schlagworte:	Electric fields Electrodes Ion velocity Ionization Magnetic fields Ordinary differential equations Plasma plasma confinement plasma diffusion plasma spontaneous rotation Power supply PROTO-SPHERA Steady state models Symmetry Velocity
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Beschreibung
Zusammenfassung:	A simple steady-state model for a 3-species mixture (ions, electrons, and neutrals) in a screw-pinch plasma configuration is developed. The model is applied to the central plasma column of the PROTO-SPHERA experiment. Degree of ionization, azimuthal current density, and azimuthal ion velocity are calculated. Full ionization is found at plasma temperatures above 1.5 eV, with neutrals confined in an outer shell where radial plasma flow develops and drives both azimuthal current and azimuthal flow.
ISSN:	2311-5521 2311-5521
DOI:	10.3390/fluids4010042